Method of making insecticide-fertilizer.



' UNITED STATES WILLIAM B. CHISOLM, OF CHARLESTON, SOUT CAROLINA.

METHOD OF MAKING INSECTIOIDE-FERTILIZER.

Specification of Letters Patent.

Patented Dec. 25, 1906.

Application filed June t, 1906. Serial No. 320,164.

To all whont it ma concern:

Be it known that I, WILLIAM B. OHIsOLM, a citizen of the United States, residing in the city and county of Charleston, State of South Carolina, have invented certain Ifew and useful Improvements in Methods of Making Fertilizer Material; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

In an application for Letters Patent of the -"United States filed by me under date of September 19, 1904, Serial No. 225,102, I have described the production of a combined fertilizer and germicide made up by grinding together sulfur and phosphatic material and finally regrinding the resulting ground mix- .ture with nitrogenous material and potash. .29

I have now discovered that the process may. be quickened materially by submitting the preliminary ground mixture of sulfur and phosphatic material to the action of a steam-bath immediately before mixing the ammonia (or other nitrogenous material) and the potash therewith" and regrinding the final mixture in this condition.

In carryingout my invention Ifirst pass the hosphatic material'for instance, phospha e-rock and. the sulfur, which may be ordinary lump-sulfur, (seconds,)' through a preliminary crusher, reducing them to the average size of a .pea or bean. The crushed rough mixture is then admitted into a- P111- product is an intimate and uniform mixture hos hate-rock and sulfur in the form of an 1m a able, owder and in a dry condition.

I fin t at t e proportionof sulfur (by weight) to give effective results may in some instances be aslow as forty pounds to the ton of the mixturefi. e, forty pounds of sulfur to nineteen hundred and sixty pounds of phosphate-rock and in other instances from sixty to one hundred ounds of sulfur to the ton of mixture; but do not desire to limit myself to these exact proportions, as it is obvious that they may be varied to a greater or less degree without departing from the spirit of my invention. ous in the sense that the grinding operation has so intimately admixed its 'particles and brought them to such afineness and equality of size that they are evenly distributed gation. I now subject this finely-ground mixture to the action of a steam-bath, thereby raising its temperature to adegree approximating that of" live steam of, say, thirty pounds pressure. I continue the action of the steam-b ath for a period of about two minutes, and I thereupon immediately add to the heated mixture the remaining nitrogenous and potash ingredients and regrind the mixture thus constituted in a Lucop or like suitable grinding-mill, as before.

In practice I have found'that a suitable fertilizer for potatoes may be' compounded from eight hundred pounds of the ground mixture of phosphate-rock and sulfur ground together w1th six hundred pounds ofcottonseed meal, four hundred'pounds of kainit, and two hundred pounds of commercial niabout eight percent. ofammonia, the commercial nitrate of soda furnishing about nineteen'per cent. of ammonia, and the kainit furnishing about twelve per cent. of potash. For wheat the relative proportion of desirable ingredients would be, say, eight hundred pounds of the ground mixture of phosphaterock and sulfur ground together with eight hundred pounds of cotton-seed mealand four hundred pounds of kainit. For cotton the .relative proportion of desirable ingredients wouldbe, say, ei ht'hundred. pounds of the ground'mixture o hosphate-rock and sulfur, six hundred pound of cottoneseed meal, four hundred pounds of kainit, and two hundred typical of appropriate mixtures adapted for use for the articular crops specified. I

Having tlius described myinvention, what I claim is v i i The method of producing a combined fertilizer and germicide, which consists in grind- ,trate of soda, the cotton-seed meal furnishing The mixture is homogenethroughout the mass and incapable of segrepounds of commercial sulfate of magnesia. Igive these individual instances as generally I in together sulfur and phosphatie material, In testimony whereof I affix my signature substantially as described.

su jeotingthe ground mixture to the action in presence of two witnesses. of a steam-bath, then incorporating with it. an

ingredient containing ammonia and an ingre- I OHISOLM' dient containing potash, and grinding the Witnesses: whole to "a substantially impalpable' powder; J. F. MCGRATH,

JOHN D; MULLER. 

